The following table shows the breakdown of the m_axis interface signals.
| Name | I/O | Description |
|---|---|---|
| m_axis_tdata | O | Packet data bus of configurable width. |
| m_axis_tvalid | O | Indicates that the master is driving a valid transfer. A transfer takes place when both m_axis_tvalid and m_axis_tready are asserted. |
| m_axis_tkeep | O | Indicates whether the content of the associated byte of s_axis_tdata is processed as part of the data stream. For metadata output of dropped packets, m_axi_tkeep = 0. This is described in the User Metadata Interface section. Note: There no are invalid byte gaps in the middle of the data bus. |
| m_axis_tlast | O | Indicates the boundary of the packet. |
| m_axis_tuser | O | User-defined sideband information transmitted alongside the data stream. It is only present if the axis_tuser keyword appears as a field name within the user metadata structure of a P4 program. It is valid beginning with the first word of an outgoing packet from the Vitis Networking P4 IP. The field remains at the same value for the duration of each packet. |
| m_axis_tdest | O | Provides routing information for the data stream. It is only present if the axis_tdest keyword appears as a field name within the user metadata structure of a P4 program. It is valid beginning with the first word of an outgoing packet from the Vitis Networking P4 IP. The field remains at the same value for the duration of each packet. |
| m_axis_tid | O | Data stream identifier that indicates different streams of data. It is only present if the axis_tid keyword appears as a field name within the user metadata structure of a P4 program. It is valid beginning with the first word of an outgoing packet from the Vitis Networking P4 IP. The field remains at the same value for the duration of each packet. |
| m_axis_tready | I | Indicates that the slave can accept a transfer in the current cycle. |